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United States Patent |
5,008,322
|
Vasta, deceased
,   et al.
|
April 16, 1991
|
Hydrophobic polymer products
Abstract
Polymeric products of styrene, an acrylate, acrylic or methacrylic acid and
polyethylene oxide, prepared in contact with a cobalt compound, are
hydrophobic and can be used as rheology control agents in printing ink.
Inventors:
|
Vasta, deceased; Joseph A. (1412 Jan Dr., Webster Farms, late of Wilmington, DE 19803);
Vasta, executrix; by Rita (1412 Jan Dr., Webster Farms, Wilmington, DE 19803)
|
Appl. No.:
|
288911 |
Filed:
|
December 23, 1988 |
Current U.S. Class: |
524/398; 524/435; 524/556; 524/578; 524/762; 524/857; 526/108; 526/135 |
Intern'l Class: |
C08K 005/04; C08K 005/06 |
Field of Search: |
526/108,135
524/398,857,762
|
References Cited
U.S. Patent Documents
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|
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|
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|
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|
3477862 | Nov., 1969 | Forsyth | 106/22.
|
3513120 | May., 1970 | Pohlemann et al. | 260/29.
|
3625715 | Dec., 1971 | Nasca | 106/2.
|
3661619 | May., 1972 | Surland | 117/62.
|
3741922 | Jun., 1973 | Glemaski et al. | 260/17.
|
3878139 | Apr., 1975 | Takahashi et al. | 260/17.
|
3887513 | Jun., 1975 | Fritze et al. | 260/33.
|
3983059 | Sep., 1976 | Sekmakas | 524/762.
|
4014833 | Mar., 1977 | Story | 260/29.
|
4173554 | Nov., 1979 | Sulzberg | 525/407.
|
4177076 | Dec., 1979 | Sato | 106/32.
|
4210565 | Jul., 1980 | Emmons | 524/567.
|
4260531 | Apr., 1981 | Wachtel et al. | 260/29.
|
4267091 | May., 1981 | Geelhaar et al. | 260/29.
|
4273833 | Jun., 1981 | De Long | 524/398.
|
4289678 | Sep., 1981 | Calder et al. | 260/33.
|
4327011 | Apr., 1982 | Ripley et al. | 524/474.
|
4334878 | Jun., 1982 | Cutler et al. | 524/88.
|
4415683 | Nov., 1983 | Kernstock | 524/43.
|
4460727 | Jul., 1984 | Shoji | 524/215.
|
4471079 | Sep., 1984 | Enami | 523/161.
|
4472537 | Sep., 1984 | Johnson et al. | 523/160.
|
4567213 | Jan., 1986 | Bhatia et al. | 523/160.
|
4648905 | Mar., 1987 | Peck et al. | 106/24.
|
4680332 | Jul., 1987 | Hair et al. | 524/377.
|
Primary Examiner: Schofer; Joseph L.
Assistant Examiner: Sweet; Mark
Attorney, Agent or Firm: Fricke; Hilmar L.
Claims
It is claimed:
1. A polymeric product obtained by bringing together, in an organic liquid,
in contact with an appropriate polymerization initiator and under
conditions suitable for polymerization,
(a) styrene,
(b) 2-ethylhexyl acrylate, 2-ethyl hexyl methacrylate or butyl acrylate,
(c) acrylic acid or methacrylic acid,
(d) polyethylene oxide having a molecular weight M.sub.n of 20,000-400,000
and
(e) a cobalt compound which provides Co.sup.+2 or Co.sup.+3 ions.
2. The product of claim 1 wherein (e) is a cobalt-boron soap modified with
C8-C13 fatty acids.
3. The product of claim 1 or 2 wherein (b) is 2-ethylhexyl acrylate and (c)
is acrylic acid.
4. The product of claim 1 or 2 wherein (a) constitutes 2-10%, (d)
constitutes 0.5-10%, and (e) constitutes 25-75 ppm, all by weight of the
total charge.
5. The product of claim 1 or 2 wherein (a) constitutes 55-70%, (b)
constitutes 20-35%, (c) constitutes 4-8%, (d) constitutes 1-5% and (e)
constitutes 25-75 ppm, all by weight of the total charge.
6. The product of claim 1 or 2 wherein (a) constitutes about 63%, (b)
constitutes about 30%, (c) constitutes about 5%, (d) constitutes about 2%,
and (e) constitutes about 50 ppm, all by weight of the total charge.
7. The product of claim 3 wherein (a) constitutes 50-85%, (b) constitutes
10-40%, (c) constitutes 2-10%, (d) constitutes 0.5-10%, and (e)
constitutes 25-75 ppm, all by weight of the total charge.
8. The product of claim 3 wherein (a) constitutes 55-70%, (b) constitutes
20-35%, (c) constitutes 4-8%, (d) constitutes 1-5%, and (e) constitutes
25-75 ppm, all by weight of the total charge.
9. The product of claim 3 wherein (a) constitutes about 63%, (b)
constitutes about 30%, (c) constitutes about 5%, (d) constitutes about 2%,
and (e) constitutes about 50 ppm, all by weight of the total charge.
Description
TECHNICAL FIELD
This invention relates to a new class of polymeric products containing
cobalt. It is more particularly directed to the polymeric products
obtained by polymerizing styrene, an acrylate, acrylic or methacrylic acid
and polyethylene oxide in contact with a cobalt compound, and to inks
containing the products as rheology control agents.
BACKGROUND AND SUMMARY OF THE INVENTION
Ethyl hydroxyethylcellulose is commonly used as an additive for printing
ink. This cellulose ester not only extends the ink but also provides
rheological control at printing viscosities and gives an ink whose print
has enhanced abrasion resistance. It is, however, quite expensive and
tends to degrade the gloss of print.
It has now been found that blending such a cellulose ester with a polymeric
product of the invention not only provides a less expensive additive
without loss of abrasion resistance, but also gives an ink whose print has
improved gloss and enhanced color intensity, especially at the red end of
the spectrum.
In addition, the polymeric product of the invention, when laid down as a
film on a substrate, demonstrates dramatic hydrophobicity, which makes it
useful as a water-repellant coating for glass and metal wherever such
things are employed.
DETAILED DESCRIPTION OF THE INVENTION
The polymeric products of the invention can be made by bringing the
following components together, under conditions suitable for
polymerization:
(1) Styrene, at a concentration of 50-85%, preferably 55-70%, most
preferably about 63%, by weight of the total charge.
(2) 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate or butyl acrylate, at
a concentration of 10-40%, preferably 20-35%, most preferably about 30%.
(3) Acrylic or methacrylic acid, at a concentration of 2-10%, preferably
4-8%, most preferably about 5%.
(4) Polyethylene oxide, at a concentration of 0.5-10%, preferably 1-5%,
most preferably about 2%. The polyethylene oxide should have a molecular
weight Mn of 20,000-400,000, preferably 100,000-300,000. Such a product is
commercially available.
(5) A cobalt compound, at a concentration of 10-150 ppm, preferably 25-75
ppm, most preferably about 50 ppm. This compound can be any which provides
Co+2 or Co+3 ions and is soluble in the system, but is preferably a
product sold by Manchem Incorporated of Princeton NJ as Manosec Cobalt 18.
This product is proprietary and its composition is therefore unknown to
the public, but it is believed to be a cobalt-boron soap modified with
C8-C13 fatty acids.
To prepare a polymer product of the invention, one takes an appropriate
amount of cobalt compound, as a solution in toluene or another suitable
organic liquid, and mixes it with (A) the desired amount of polyethylene
oxide and (B) an inert organic liquid such as xylene, and then brings the
mixture to reflux temperature. To this mixture is then added a mixture of
(1), (2) and (3), as described above, together with an appropriate amount
of a conventional polymerization initiator such as ditertiary butyl
peroxide The resulting mixture is held at reflux temperature until
polymerization is substantially complete, as determined by conventional
viscosity measurements.
The resulting mass, a solution of polymer product in the organic liquid,
can be concentrated by evaporation or can be laid down on a substrate and
dried to give a hydrophobic film.
To use the polymer product of the invention as an ink additive, it is mixed
with a cellulose ester, preferably ethyl hyroxyethylcellulose, in
product/ester weight ratios of 20-80/8020, preferably about 50/50, to give
a concentrate. This concentrate can then be added to conventional ink at a
concentration of 0.5-4% by weight, preferably about 2%, as needed.
EXAMPLE
Those skilled in the art will be able to practice this invention more
easily after referring to the following illustrative example.
These artisans will no doubt be able to compose numerous variations on the
theme disclosed, such as changing the amounts of components slightly but
insignificantly from those shown, adding innocuous substances, or
substituting equivalent or nearly equivalent components for those shown.
All such variations are considered to be within the inventive concept.
In the Example, all parts are by weight.
A mixture was prepared to contain
______________________________________
Xylene 1190.00 parts
Manosec 18 5.01 parts
(10% in toluene)
Polyethylene oxide 36.00 parts
MW = 300,00
______________________________________
This mixture was heated to reflux temperature and held there, with
stirring, while the following mixture was added over a four-hour period:
______________________________________
Styrene 1134.00 parts
2-ethylhexyl 540.00 parts
acrylate
Acrylic acid 90.00 parts
Ditertiary butyl 52.92 parts
peroxide
______________________________________
To the resulting mixture was then added a mixture of
______________________________________
t.butyl 18.00 parts
peroxyacetate
Xylene 10.00 parts
______________________________________
The reaction mass was then held at reflux temperature, with stirring, for
two hours, to give the polymer product styrene/2-ethylhexyl
acrylate/acrylic Acid/polyethylene oxide, 63/30/5/2, which was a clear
light tan solution, 59.5% solids, with a Gardner-Holdt viscosity of Z-4.
This solution was diluted to a concentration of 10% with toluene, and was
then mixed in equal proportions with a 10% solution of ethyl hydroxyethyl
cellulose (Hercules HE 350), to give a concentrate.
Forty parts of this concentrate was then mixed with 160 parts of ink
(R1909-148, General Printing Ink Division, Sun Chemical Corp.) and the
product drawn on a glass plate and dried. The resulting film was glossy
and not readily wettable with water.
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